Let me first start by saying that the validator is a great tool and I use a
lot.
It will be even better if when an error is detected, there could be a link
to the w3.org resource that describes the particulars for this tag. For
example in the case bellow
Line 16, column 22:
<STYLE type="text/css">
^
Error: element "STYLE" not allowed here; check which elements this element
may be contained within
it would be great if there was a link to the style element in the w3.org
documentation.
Sincerely,
Iassen Hristov